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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the molar mass of water (H₂O)?
💡 Hint: Add the atomic masses of H and O.
Question 2
Easy
How many grams is 0.25 moles of sodium (Na) if the molar mass is 22.99 g/mol?
💡 Hint: Use the formula: mass = moles x molar mass.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What does 1 mole of any substance represent?
- 6.022 x 10²³ particles
- 1 gram
- 12 grams of carbon
💡 Hint: Think of how we use moles to count atoms and molecules.
Question 2
True or False: A balanced chemical equation has equal numbers of atoms for each element on both sides.
- True
- False
💡 Hint: Consider the definition of a balanced equation.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
If you react 5.00 g of aluminum with excess chlorine gas to produce aluminum chloride, what is the theoretical yield of AlCl₃?
💡 Hint: Start by finding the moles of Al and use the balanced equation to find moles of AlCl₃ produced.
Question 2
A solution is prepared by dissolving 58.44 g of NaCl in 500 mL of water. What is its molarity?
💡 Hint: Remember the formula: Molarity = moles of solute / liters of solution.
Challenge and get performance evaluation